Size and Weight:
A close relative of Giganotosaurus--which lived a continent away, in South America--Carchardontosaurus was one of the biggest carnivorous dinosaurs that ever lived, with a longer skull than even Tyrannosaurus Rex. On the down side, though, this large theropod, an extensive group of bipedal carnivores that included both tyrannosaurs and raptors, appears to have been substantially more stupid, with a much smaller brain cavity compared to its head size.
The "great white shark lizard" has had an especially troubled fossil history. When the remains of Carcharodontosaurus were first discovered, this dinosaur was believed to have been a species of Megalosaurus, and its original fossils were destroyed in a bombing raid on Germany during World War II.